Please help me to correct the mistakes:

[san2612]

Please help me to correct the mistakes:
1 If man continues destroying ( A) the environment, his life will (C) be affected(D). ---> must
2 I'd lost my front door key and I had to smash a window by a brick to get in
-----> with
3 There was a very interesting news on the radio this morning about the earthquake in Italy.
----> some
4 When they (A) entered the room, they (B) found the dog (C) lying (D) motionlessly on the floor
--->motionless
5, (A) the fire started (B) in the fifth floor of the hotel, then (C) spread to (D) adjacent floor
---> from
thanks in advance

[wise owl]

I didn't quite understand what needs to be corrected.

[san2612]

I didn't quite understand what needs to be corrected.

I corrected the underlined words, please help me to check my answers